Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B1/00—Layered products having a non-planar shape
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
  • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
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  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
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  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
  • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
  • B32B7/02—Physical, chemical or physicochemical properties
  • B32B7/023—Optical properties
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B44—DECORATIVE ARTS
  • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
  • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
  • B44C1/005—Processes, not specifically provided for elsewhere, for producing decorative surface effects by altering locally the surface material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B44—DECORATIVE ARTS
  • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
  • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
  • B44C1/18—Applying ornamental structures, e.g. shaped bodies consisting of plastic material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B44—DECORATIVE ARTS
  • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
  • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
  • B44C1/22—Removing surface-material, e.g. by engraving, by etching
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B44—DECORATIVE ARTS
  • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
  • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
  • B44C1/22—Removing surface-material, e.g. by engraving, by etching
  • B44C1/228—Removing surface-material, e.g. by engraving, by etching by laser radiation
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
  • B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
  • B65D1/0207—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by material, e.g. composition, physical features
  • B65D1/0215—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by material, e.g. composition, physical features multilayered
• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
  • G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B3/00—Simple or compound lenses
  • G02B3/0006—Arrays
  • G02B3/0012—Arrays characterised by the manufacturing method
• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
  • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
  • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
  • G02B6/0065—Manufacturing aspects; Material aspects
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
  • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
  • B32B2037/148—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers whereby layers material is selected in order to facilitate recycling of the laminate
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2250/00—Layers arrangement
  • B32B2250/24—All layers being polymeric
• • B—PERFORMING OPERATIONS; TRANSPORTING
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  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2250/00—Layers arrangement
  • B32B2250/42—Alternating layers, e.g. ABAB(C), AABBAABB(C)
• • B—PERFORMING OPERATIONS; TRANSPORTING
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  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/40—Properties of the layers or laminate having particular optical properties
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  • B32B2307/00—Properties of the layers or laminate
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  • B32B2307/00—Properties of the layers or laminate
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• • B—PERFORMING OPERATIONS; TRANSPORTING
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  • B32B2439/00—Containers; Receptacles
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• • B—PERFORMING OPERATIONS; TRANSPORTING
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• • B—PERFORMING OPERATIONS; TRANSPORTING
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  • B32B2553/00—Packaging equipment or accessories not otherwise provided for
• • B—PERFORMING OPERATIONS; TRANSPORTING
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  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B38/00—Ancillary operations in connection with laminating processes
  • B32B38/06—Embossing
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
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  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
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  • Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
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  • Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
  • Y10T428/1379—Contains vapor or gas barrier, polymer derived from vinyl chloride or vinylidene chloride, or polymer containing a vinyl alcohol unit
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
  • Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree

Definitions

• the present invention relates to a decorated plastic package and a method of reprocessing the same.
• the present invention relates to a colored plastic package, a method of decorating the same, and a method of regenerating the plastic package.
• the color is maintained.
• the present invention relates to a plastic package that can be easily erased and a method for regenerating the plastic package.
• Plastic is suitable for mass production because it is easy to mold.Because it has excellent physical properties such as transparency and impact resistance, it is used for bottles, cups, vouchers, wrapping sheets, etc. Widely used as various packaging.
• These packages package various beverages, seasonings, cosmetics, chemicals, and the like as contents. However, some of these contents are deteriorated or degraded by light, so the package may be colored to protect such contents from light.
• coloring may be applied as part of the decorating of the package in order to decorate the package and add aesthetics to differentiate it from similar products.
• coloring of plastic packaging is performed by blending a coloring agent such as a pigment or a dye with the plastic that is the main material of the packaging. By incorporating these coloring agents, the package absorbs light of a specific wavelength and develops color.
• a plastic container in which various pigments and dyes are mixed in a resin and colored in green, blue, brown, or the like can be used.
• a container penetration of the wavelength component of light absorbed by the coloring component into the container is suppressed, and protection of contents that are liable to be deteriorated or deteriorated by light rays, that is, visible light barrier performance is imparted.
• it is colored to a specific color Containers can create a product image and differentiate it from competitors' products, and can motivate consumers to purchase their own products.
• PET bottles bottles formed using PET (polyethylene terephthalate) as a base resin
• PET polyethylene terephthalate
• the package is decorated by covering it with a colored label, and at the time of reproduction processing, the package body and the label are separated and processed.
• This method satisfies the recyclability of the package itself, but requires a process of peeling and separating the label from the used package.
• JP-A-8-80928 discloses that a layer containing a flaky thin film having a high refractive index so as to be oriented in the surface direction of the surface of a package is provided on the outer layer of a thermoplastic resin layer. Has proposed a package that emits chromatic colors.
• this package uses a large amount of mica titanium pigment or the like as its scale-like thin film, and it is necessary to separate materials at the time of recycling, so there is still a problem in recyclability.
• the method of coloring by the above-described physical coloring mechanism is also not permitted in the current recycling flow, like the method by the above-described chemical coloring mechanism.
• Japanese Patent Application Laid-Open No. H10-250741 pages 1-4 and FIGS. 1-110) discloses a laminated film having a predetermined shape having a thin-film interference function.
• a transparent container arranged along the inner surface of a transparent container body has been proposed.
• this transparent container must include the laminated film, It was limited to potters having a mouth with an inner diameter smaller than the inner diameter of the body. For this reason, it was not possible to target a plastic tray or the like made of plastic. In short, since the laminated film is immersed in the contents, if the contents are food, there were hygiene problems.
• the current packaging employing the chemical coloring mechanism could not be removed in the process of recycling pigments and dyes contained in the packaging.
• the flow from the production of a package, for example, a PET bottle to its recycling can be mainly divided into the production process, distribution process, collection, and re-product process.
• PET bottles manufactured by stretch-orienting injection-molded preforms by blow molding are sold (consumed) after the contents are filled, and then collected.
• the collected PET bottles are crushed and washed after the colored bottles are separated, and then regenerated into flakes or pellets after the impurities are separated.
• injection molding and blow molding are performed in the manufacturing process, and melt extrusion is performed in the re-pelletizing process in the recovery and re-producting (regeneration process) process.
• the material is subjected to high-temperature, high-pressure, and other stimuli.
• Material evaluation criteria are indicators provided to evaluate whether a once manufactured bottle is suitable for reuse or remanufacturing. This is an arrangement.
• Figure 11 shows the flow of a pet bottle's reusability test (evaluation of reusability) performed using this material evaluation standard.
• the evaluation of reusability was performed by crushing a prototype bottle to be evaluated, reclaimed flakes, reclaimed pellets obtained by melt-molding the reclaimed flakes, and injection molding the reclaimed pellets. This is performed on each of the fibers, bottles, and sheets obtained by molding the injection molded plate and recycled pellet obtained.
• the content of evaluation is “Appearance, crushing suitability” for recycled flakes, “IV, color, drying suitability” for recycled pellets, “Appearance, haze, thermophysical properties” for injection molded plates, and fiber bottles.
• Examples of the sheet include “formability, mechanical properties, color tone, haze, etc.”.
• color tone is an evaluation that is performed on a wide variety of items such as recycled pellets, fibers, bottles, and sheets.
• the prototype bottle contains pigments and dyes, it is still colored by the pigments and the like even when it is molded into recycled pellets. Failure to meet criteria. Even at the stage of forming into fibers, bottles, and sheets, the color remains without erasing, and thus is not suitable for the evaluation criteria of “color tone”.
• PET bottles mixed with pigments and dyes could not be used as raw materials for remanufactured products because they did not meet the material evaluation criteria. For this reason, PET bottle manufacturers have voluntarily refrained from coloring pet bottles.
• containers molded from PET bottles are Coloring in order to provide functions such as decoration and decoration is effective from various viewpoints, such as preventing deterioration and deterioration of the contents, promoting the commercialization of new products, differentiating from competitors' products, and promoting sales of in-house products. That was desirable.
• the production of PET bottles '' In the recycling industry, a technology that can provide consumers with bottles with functions such as a visible light barrier and decoration while adapting to the content of reusability adequacy evaluation, In other words, in the distribution process, it was possible to provide colored PET bottles, but in the collection and re-production process, there was a need for a proposal for a technology that could erase the attached color.
• the present invention has been made in view of the above circumstances, and has a function such as a visible light barrier and decoration in a distribution process, and an evaluation of reusability in a recovery and re-producting process.
• the purpose of the present invention is to provide a plastic package which can satisfy the evaluation criteria of the above, and which can promote the recycling by increasing the reuse rate, and a method for reprocessing the same. Disclosure of the invention
• the present inventors have developed a package having a thin film laminated structure made of substances having different refractive indexes, and a package that develops a color due to an interference effect caused by the thin film laminated structure;
• the present inventors have found that a package that develops color by forming a fine periodic array structure having different optical characteristics on the surface of the body can be easily decolorized by heating in the reprocessing step and has excellent recyclability.
• the term "plastic package” means that the bulk of the package is formed of plastic, and also includes those containing some inorganic substances. It also includes the meaning of multilayer packaging structure and packaging structure.
• coloring and “decoration” refer to coloring a plastic package with a chromatic color or blocking light in a specific wavelength range from passing through the inside of the plastic package. It is the meaning including the etc.
• the container body has a thin film laminated structure made of substances having different refractive indexes, and color is generated by an interference effect caused by the thin film laminated structure. I do.
• the plastic package When the plastic package is made in this way, the interference effect caused by the thin film laminated structure is reduced. Therefore, since the color is developed, the plastic package can have a function such as a visible light barrier or decoration. When the plastic package is melted, the regular structure of the physical coloring mechanism is destroyed, so that the attached color can be erased.
• the PET bottle is processed as follows in the flow of manufacturing and recycling (FIG. 10).
• Pet bottles manufactured in the manufacturing process are colored by the interference effect caused by the thin-film laminated structure, so in a distribution process that requires only a visible light barrier and decoration functions, these functions are sufficiently and reliably performed. Can be demonstrated.
• the PET bottles are discolored because the thin-film laminated structure is destroyed due to melting or the like and the regular structure is broken. For this reason, when the reusability of the recycled product obtained through the collection and recycling process is evaluated, the criteria for “color tone” can be satisfied.
• the plastic package of the present invention can possess and exhibit functions such as a visible light barrier and decorating in the market. Can be satisfied.
• the plastic package can be re-manufactured, so that the reuse rate can be improved and, consequently, recycling can be promoted.
• the plastic package itself of the present invention develops color
• the plastic package itself is not limited to bottles, but may be cups and trays.
• the range of use of the transparent container described in Japanese Patent Application Laid-Open No. H10-250741 can be expanded as compared with the case where the transparent container is intended for only a bottle.
• the thin film laminated structure is laminated on the outer surface of the container, no problem in terms of sanitation occurs even if the contents are food.
• the container in the plastic package, has a resin layer other than the thin-film laminated structure, and one or more resins in the thin-film laminated structure are different from each other. Same as one or more resins in the resin layer.
• the recyclability of the plastic package can be improved because one or more resins in the thin film laminated structure and one or more resins in the other resin layers are of the same type. .
• the other resin layer is made of a base resin layer.
• the one or more resins in the base resin layer, which is another resin layer, and the one or more resins in the thin film laminated structure are of the same type, so that the plastic package Recyclability can be improved.
• the plastic package is a rigid container in which the package body is made of resin.
• a rigid container made of a resin can be colored by an interference effect caused by the thin film laminated structure. Therefore, the rigid container can be provided with functions such as visible light parallax and decoration. If the rigid container is melted at a certain temperature or higher, the regular structure of the physical coloring mechanism is destroyed, so that the attached color can be erased. This allows the rigid container to be re-manufactured, improves the reuse rate, and promotes recycling.
• the plastic package according to the second aspect of the present invention at least a part of the surface of the package is periodically arranged with portions having optical characteristics different from those of the surface.
• a plastic package for example, a plastic package mainly composed of a crystalline resin, and the portion having the different optical characteristic has a crystal structure different from the crystal structure of the surface.
• the method for decorating a plastic package according to the third invention is a method for decorating a plastic package by periodically arranging portions having optical characteristics different from those of the surface on at least a part of the surface of the plastic package.
• This is a method of decorating a plastic package to be decorated.
• a plastic package is mainly made of a crystalline resin, and a portion having the different optical characteristics is formed by providing a spherulite portion on the surface.
• Decorating method forming the spherulite using light diffraction or interference phenomenon decorating method, made of plastic material having a wavelength region showing transparency and a wavelength region showing translucency or opacity Irradiating at least a part of the surface of the plastic package with light having a wavelength included in the translucent or opaque wavelength region to form a portion having different optical characteristics in the transparent wavelength region.
• the decorating method a decorating method for forming the spherulite portion on the surface by previously forming an uneven portion for condensing light on the surface, and irradiating the uneven portion with light.
• the heat-absorbing fine particles are mixed and dispersed in the package, and the package is locally irradiated with a laser beam to generate heat, and the resin around the light-heat absorbing fine particles is vaporized to form a cavity.
• a decorating method for forming portions having different optical characteristics can be given.
• the plastic packaging body recycling method according to the fourth invention is a recycling processing method in which the above-mentioned plastic packaging body is collected, melted, and subjected to a recycling processing. There is a method that is performed at a temperature higher than the disappearing temperature. If such a method of recycling plastic packaging is used, the recovered plastic packaging is melted at a temperature above a certain temperature (the temperature at which the color of the plastic packaging disappears), and its regular structure is improved. And destroy the color. As a result, the packaging structure can satisfy the reusability ap- proval in the collection and recycling process.
• the INVENTION has a thin film laminated structure which consists of a substance with a different refractive index, and can color a plastic package body by the interference effect resulting from this thin film laminated structure.
• plastic packaging can be colored by injection molding in the manufacturing process of manufacturing and recycling, and plastic packaging can be decolorized by melt extrusion in the recovery and remanufacturing process.
• the function of a visible light barrier and decoration by coloring the package can be exhibited, and the color can be erased in the recovery and re-product process to enable recycling.
• FIG. 1 is a configuration diagram showing the configuration of the plastic package of the present invention.
• FIG. 2 is a configuration diagram showing another configuration of the plastic package of the present invention.
• FIG. 3 is a diagram for explaining a chemical coloring mechanism and a physical coloring mechanism.
• (A) shows a chemical coloring mechanism
• (b) shows a physical coloring mechanism.
• FIG. 4 is a configuration diagram showing still another configuration of the plastic package of the present invention.
• FIG. 5 is a view for explaining the first embodiment of the decorating method of the present invention.
• Figure 6 is an enlarged view of the area around the diffraction grating, showing the appearance of interference fringes of the laser beam.
• Fig. 7 shows the periodic array structure formed on the wall of the plastic pottle container.
• FIG. 8 is a view for explaining a second embodiment of the decorating method of the present invention.
• FIGS. 9A and 9B are views for explaining a third embodiment of the decorating method of the present invention.
• FIG. 9A is a view in which a laser beam is irradiated in a spot shape
• FIG. 9B is an interference fringe pattern.
• FIG. 3 is a diagram of irradiating a single laser beam using the laser beam.
• Fig. 10 is an explanatory diagram showing the flow from the production of the bottle to the recycling (flow of production and recycling of the bottle).
• FIG. 11 is an explanatory diagram showing a flow of the reusability evaluation.
• the container body has a thin film laminated structure made of substances having different refractive indices, and color is generated by an interference effect caused by the thin film laminated structure.
• the thin film laminated structure 2 when the thin film laminated structure 2 is composed of a plurality of layers, it has an alternate laminated structure of two types of layers A and B having different refractive indexes. Thereby, the plastic package 1 itself develops a color by its physical coloring mechanism. At this time, the thickness of the two types of layers A and B is a thin film of 1 ⁇ m or less. Also, the higher the difference between the refractive indices of the two types of layers A and B, the greater the number of repetitive laminations, and the more uniform the control of the layer thickness, the higher the coloring efficiency. In general, when such a thin-film laminated structure is composed of only a polymer, efficient coloring can be obtained by increasing the number of repetitions because the difference in refractive index is limited.
• the plastic package 1 having the thin film laminated structure 2 further has another resin layer 3.
• the layers constituting the thin film laminated structure 2 and the other resin layer 3 have different refractive indices, so that a color is formed by a physical coloring mechanism.
• Chemical color development occurs when white light containing light in a plurality of wavelength ranges is incident on an object and the object absorbs light in a wavelength range showing a specific color.
• the principle of this chemical coloration is that a substance absorbs light of a specific wavelength (light of a selected wavelength) and develops a color according to the state energy transition of a chemical species.
• the wavelength of light absorbed by a substance is determined by the chemical structure of the substance, it is necessary to use a specific chemical substance to give a specific color.
• the specific chemical substance include a pigment and a dye.
• the coloring by the physical coloring mechanism does not emit light due to the inherent properties of the substance, but is achieved by forming a certain structure on the light incident surface.
• a specific wavelength light selective wavelength light
• the characteristics of this physical coloring are that, even with general-purpose materials alone, they develop color if a regular structure is formed, they can be easily erased by destruction of the regular structure, and the materials used are limited. It is effective under the recycling regulations.
• an important feature in completing the present invention is that the color can be easily erased by breaking the regular structure.
• a plastic package emits color by a physical coloring mechanism due to an interference effect caused by a thin film laminated structure composed of substances having different refractive indexes. When the plastic package is heated, the color disappears when the regular structure breaks.
• a PET bottle composed of a plastic package constituted by the base resin layer and the thin film laminated structure is physically separated. A color is generated by a color forming mechanism. Then, when it is melted and heated in the process of recovery and remanufacturing, the regular structure is destroyed and discolored.
• the colored PET bottles can be re-manufactured in the manufacturing process, and recycling can be promoted.
• thermoplastic polyester an aliphatic, alicyclic or aromatic polyester derived from a dicarboxylic acid component and a diol component, or a copolymer or blend thereof can be used.
• examples of the dicarboxylic acid component include aromatic dicarboxylic acids such as terephthalic acid, isophthalic acid, and naphthalenedicarboxylic acid; aliphatic carboxylic acids such as succinic acid, adipic acid, and sebacic acid; and alicyclic groups such as cyclohexanedicarboxylic acid.
• dicarboxylic acid and the like examples include aliphatic diols such as ethylene glycol, diethylene glycol, and butanediol; alicyclic glycols such as cyclohexanedimethanol (C HDM); and aromatic diols such as bisphenols. And the like.
• a polyvalent carboxylic acid component and a polyhydric alcohol component having a trivalent or higher functional group can also be used.
• PET polyethylene terephthalate
• PBT polybutylene terephthalate
• PEN polyethylene naphthalate
• polycarbonate polyarylate
• isophthalic acid copolymerized PET PET-I
• CH DM cyclohexane dimethanol
• thermoplastic polyamide can be used.
• thermoplastic polyamide include aliphatic, alicyclic or aromatic polyamides derived from a dicarboxylic acid component and a diamine component, polyamides derived from an aminocarboxylic acid or its ratatum, or copolymers thereof.
• a blend can be used.
• dicarboxylic acid component include aliphatic dicarboxylic acids such as succinic acid, adipic acid, sebacic acid, and decanedicarboxylic acid, and aromatic dicarboxylic acids such as terephthalic acid and isophthalic acid.
• the diamine components include linear or branched aliphatic diamines such as 1,6-diaminohexane, 1,8-diaminooctane, 1,10-diaminodecane, and bis (aminomethyl) cyclohexane.
• linear or branched aliphatic diamines such as 1,6-diaminohexane, 1,8-diaminooctane, 1,10-diaminodecane, and bis (aminomethyl) cyclohexane.
• examples include alicyclic diamines such as xane and bis (4-aminocyclohexyl) methane, and aromatic diamines such as m-xylylenediamine and p-xylylenediamine.
• aminocarboxylic acid component examples include aliphatic aminocarboxylic acids such as ⁇ -aminocaproic acid, ⁇ -aminooctanoic acid, and ⁇ -aminoundecanoic acid, and aromatic aliphatic aminocarboxylic acids such as ⁇ -aminomethylbenzoic acid and ⁇ -aminophenylacetic acid. Acid, etc. You.
• 6-nylon, 6,6-nylon, 11-nylon, 12-nylon, 6,10-nylon, 6,12-nylon, MXD6 (metaxylylene dipamide) nylon, etc. are preferably used. Is done.
• an olefin resin can also be used.
• polyethylene such as low-density polyethylene (LDPE), medium-density polyethylene (MDPE), high-density polyethylene (HDPE), linear low-density polyethylene (LLDPE), linear ultra-low-density polyethylene (LVLDPE), Polypropylene (PP), ethylene-propylene copolymer, polybutene-11, ethylenebutene-11 copolymer, propylenebutene-11 copolymer, ethylene-1-propylenebutene-11 copolymer, ethylene-vinyl acetate copolymer, Examples include an ionically cross-linked copolymer (Ionoma I) or a blend thereof. Other examples include polyacrylonitrile, polystyrene, polymethylpentene, polyvinyl alcohol, polymethyl methacrylate, cyclic olefin copolymers (COC), and fluoropolymers.
• Ionoma I ionically cross
• one or more resins in the thin film laminated structure 2 be the same kind of resin as one or more resins in the other resin layer 3. Thereby, the recyclability of the plastic package 1 can be improved.
• the container made of the plastic package 1 is a PET bottle
• one or more of the substances constituting the thin film laminated structure 2 be a polyester resin.
• the other resin layer 3 is also PET, that is, a polyester resin, the recyclability of the pet bottle can be improved.
• a functional resin such as a parier material
• coloring and functional addition can be performed simultaneously.
• Examples of the substance constituting the other resin layer 3 include the above-mentioned polyester, polyamide, and polyolefin resin.
• the other resin layer 3 can be, for example, a base resin layer for maintaining the shape of the container formed of the plastic package 1.
• a PET layer of a PET bottle, a polyethylene layer of a food container, a polypropylene layer, and the like correspond to the base resin layer.
• the container formed of the plastic package 1 can be a rigid container made of resin.
• the rigid container examples include a bottle, a cup, and a tray.
• the rigid container includes a preform which is an intermediate product.
• the rigid container By making the container formed of the plastic package 1 a rigid container made of resin, the rigid container can be re-manufactured and recycling can be promoted.
• the other resin layer 3 constituting the plastic package 1 is a single layer, but is not limited to a single layer, and may be two or more as shown in FIG. .
• the thin film laminated structure 2 has four layers, but is not limited to four layers. For example, three or less layers or five or more layers can be used.
• Co-Injection co-injection
• Over-Co-Injection over-injection
• die slide injection die slide injection
• the plastic package of the present invention is decorated by applying a physical coloring mechanism.
• a physical coloring mechanism by arranging parts having different optical characteristics periodically in a plastic package, light interferes and diffracts to generate color.
• Periodically arranging the parts having different optical characteristics means that the optical characteristics such as refractive index, reflectivity, transmittance, absorptance, degree of polarization, etc. are regularly- This means that the array is changed periodically.
• spots and lines with different refractive indices from the surroundings can be formed on at least some surfaces of the plastic package at regular intervals, or spot lines with different absorptivity from the surroundings can be It is conceivable to form them at least on some surfaces at regular intervals.
• the periodic structure is formed three-dimensionally, that is, in the surface direction of the package and the thickness direction of the surface. You can decorate.
• the “surface of the plastic package” includes not only the surface of the surface forming the package, but also any surface formed inside the surface, for example, the inner layer in a multilayer container. The surface to be formed and the interface between layers are also included.
• the arrangement period of the optical characteristics is determined by the color to be developed or the wavelength of light to be blocked. For example, when shielding infrared light from the ultraviolet region, 0.1 to 5 m is an appropriate range. In addition, by forming an arrangement cycle on the package that acts on light in the wavelength range of 0.4 m to 0.7 ⁇ m, which is a visible light region, it is possible to color the package in an arbitrary color.
• the periodicity does not necessarily need to be perfect, and some may have a defect such as loss of periodicity or discontinuity in the periodic structure, and the periodicity is maintained as a whole. Just do it.
• the arrangement cycle of the optical characteristics may be different for the entire decorative portion of the plastic package, instead of the same pattern.
• a pattern of a plurality of colors can be formed.
• the repetition period required to obtain the coloration due to the periodic structure is at least 10 periods, preferably at least 50 periods, particularly at least 100 periods.
• the plastic bottle container can be formed by a normal potter container forming means. For example, it can be obtained by stretching a preform.
• a bottomed cylindrical preform manufactured by an appropriate means such as an injection molding method, a compression molding method, a multilayer injection molding method, a multilayer compression molding method, Thermal crystallization (spherulite formation) by appropriate means to provide heat resistance.
• an appropriate means such as an injection molding method, a compression molding method, a multilayer injection molding method, a multilayer compression molding method, Thermal crystallization (spherulite formation) by appropriate means to provide heat resistance.
• the preform is heated to a stretching temperature equal to or higher than the glass transition point (T g), and in a mold heated to a predetermined heat treatment (heat set) temperature, is stretched longitudinally (axially) by a stretching rod or the like. Direction) and in the lateral direction (circumferential direction) by blow air.
• the above-mentioned blow mold is heated, and at the time of biaxial stretching blow, heat treatment (heat setting) is performed by bringing the outer side of the container wall of the blow molded body into contact with the inner surface of the mold for a predetermined time. Then, after the heat treatment for a predetermined time, the blow-molding body is cooled by switching the professional fluid to the internal cooling fluid.
• heat treatment heat setting
• the bottle container formed by stretch blow molding is stretched in the blow direction and is oriented and crystallized.
• the blow molded product taken out of the mold is cooled by allowing it to cool or by blowing cold air.
• the plastic material forming the plastic bottle container is, for example, polyethylene terephthalate (PET), polyethylene isophthalate, polybutylene terephthalate, polyethylene naphthalate, polycarbonate, polyarylate, or a copolymer of a monomer forming the above resin.
• PET polyethylene terephthalate
• polyethylene isophthalate polyethylene isophthalate
• polybutylene terephthalate polyethylene naphthalate
• polycarbonate polyarylate
• copolymer of a monomer forming the above resin for example, polyethylene terephthalate (PET), polyethylene isophthalate, polybutylene terephthalate, polyethylene naphthalate, polycarbonate, polyarylate, or a copolymer of a monomer forming the above resin.
• Thermoplastic polyesters such as copolymers of cyclohexanedimethanol with the monomers forming the above resins, polyethylene (PE), polypropylene (PP), polystyrene, cyclic olefin copolymers, ethylene-vinyl alcohol copolymers Polymers, nylon resins, vinyl chloride resins, adhesive resins, blends of these resins and other resins are preferred, and ethylene terephthalate thermoplastic polyesters such as polyethylene terephthalate are particularly preferred. .
• plastic materials may be used as materials for forming a single-layer plastic bottle container, or as materials for forming arbitrary parts such as an inner / outer layer, an intermediate layer, an adhesive layer, etc., constituting a multilayer plastic bottle container. They may be used in combination.
• 5 to 7 are diagrams for explaining a first embodiment of a method of forming a periodic array structure having different optical characteristics.
• a periodic array structure is formed on a plastic bottle container by utilizing the diffraction phenomenon of laser light.
• a laser light source 11, a lens 12, and a diffraction grating 13 are used.
• the laser light source 11 oscillates laser light, and for example, a carbon dioxide gas laser, a YAG laser, a semiconductor laser, a gas laser such as helium-neon or argon, an excimer laser, or the like can be used. In addition, those obtained by wavelength-converting these laser beams can also be used.
• the laser beam may be used in a continuous oscillation state or in a pulse oscillation state.
• the lens 12 converts the laser beam oscillated from the laser light source 11 into a parallel beam.
• the diffraction grating 13 diffracts a laser beam.
• a mesh having a lattice spacing of 0.1 m to 2000 m can be used.
• a plastic bottle container 14 to be decorated is arranged on the side of the diffraction grating.
• the laser light emitted from the laser light source 11 is converted into a parallel light by the lens 12.
• the collimated laser beam passes through the diffraction grating 13 to form a periodic pattern of interference fringes, that is, an intensity distribution of one laser beam.
• FIG. 6 is an enlarged view of the vicinity of the diffraction grating, showing the state of interference fringes of laser light.
• the laser light that has passed through the diffraction grating 13 diffracts and interferes to form a periodic (having a regular pattern) pattern.
• a portion 16 of the container wall 15 is locally heated by the portion 16 having a high laser beam intensity.
• the wall thickness of the wall 15 is about 100 ⁇ m. Heat treatment is performed at a depth of 1 to 5 m near the layer.
• the heated part When the heated part reaches a certain temperature or higher, only that part is melted, the structure consisting of the amorphous part and the oriented crystal part formed on the wall surface 15 of the container is released, and then cooled. A spherulite is formed.
• This temperature varies depending on the resin used, but is, for example, about 190 ° C. in the case of polyethylene terephthalate.
• FIG. 8 is a diagram for explaining a second embodiment of a method for forming a periodic array structure having different optical characteristics.
• a periodic array structure is formed on a plastic bottle container by using refraction and collection of laser light.
• fine uneven portions 19 having a lens effect are formed on the container wall surface 15 of the plastic bottle container 14.
• the uneven portion 19 is formed, for example, by forming an uneven shape on the surface of the blow mold in the molding process of the plastic bottle container described above, and transferring it from the mold to the container wall surface during heat treatment. Can be formed.
• the light is refracted by the light, and is condensed from the vertex of the convex portion to a certain portion in the thickness direction.
• the portion where the laser light is focused is heated by the energy of the laser light because the intensity of the laser light increases.
• the spherulite portion can be periodically generated by forming the uneven portion 19 periodically on the wall surface 15 of the plastic bottle container.
• a periodic array structure having different optical characteristics (refractive index) can be formed.
• the present embodiment has a periodic uneven portion formed on the wall surface of the plastic bottle container and a periodic array structure having different optical characteristics (refractive index) formed by the oriented crystal portion and the spherulite portion. It is possible to obtain a rainbow-like luster as seen in holograms.
• FIG. 9 is a diagram for explaining a third embodiment of a method for forming a periodic array structure having different optical characteristics.
• the resin that is the main material of the plastic bottle container 14 is mixed and dispersed with light-heat-absorbing fine particles 20 that are the core of heat generation, and the container is formed.
• the light-heat-absorbing fine particles are fine particles that generate heat in response to a specific laser beam, and include, for example, my power, kaolin, talc, and mica coated with titanium oxide.
• the particle size of the light-heat absorbing fine particles is 0.1 rr! 1100 m. If it is larger than 100 m, it may become opaque when blended with the above resin. Preferably, it is 0.2 m to 30 m.
• the light-heat-absorbing fine particles 20 may be incorporated in the entire plastic bottle container (preform).
• preform a multilayer preform may be used and may be blended only in a specific layer.
• the plastic bottle container 14 containing the light-heat absorbing fine particles 20 is irradiated with laser light.
• the photothermal absorbing fine particles 20 generate heat due to the energy thereof.
• the resin around the light-heat-absorbing fine particles 20 is heated and vaporized by this heat, and forms fine hollow portions 21.
• the refractive index of the cavity shows the same value (about 1.0) as that of air, and is different from the refractive index of the surrounding plastic (about 1.3 to about 1.5).
• the hollow portion 21 can be formed periodically, and the optical portion can be formed optically.
• Periodic array structures having different characteristics (refractive index), that is, portions having different refractive indexes can be periodically formed at regular intervals.
• decoration can be performed by blending a relatively small amount of photothermal absorption fine particles.
• the control method used in laser marking irradiates a spot-like laser beam at regular intervals, and as shown in Fig. 9 (b), it uses the principle of interference fringes of the laser beam. There is a control method.
• FIG. 9 (b) the laser light emitted from the laser light source 11 is converted into a parallel light by a lens 12, and is divided into two directions of light a and] 3 by a half mirror 23.
• the split light is reflected by mirrors 23 and 24, respectively, and then applied to the wall 15 of the plastic container.
• a periodic pattern is formed on the wall surface 15 because interference fringes due to the optical path difference between the laser beams ⁇ and 3 are formed.
• optical properties of plastic materials especially transmittance (or absorption), vary with wavelength.
• plastic materials have a transparency of at least about 70%, a translucency of at least 10% and less than 70%, or an opacity of less than 10% Shows any property of lightness.
• the plastic material is transparent for a certain wavelength, the effect of the light on the plastic package is less effective.
• the plastic material is translucent or transparent, light penetrates into the package.
• a plastic package By utilizing the wavelength dependence of these optical properties, a plastic package can be constructed.
• a plastic material When a plastic material is irradiated with light of a wavelength that is translucent, a three-dimensional periodic structure can be formed on the surface of the plastic package.
• a two-dimensional periodic structure can be formed on the surface of the plastic package.
• the periodic structure once formed in this manner can be decorated by exhibiting physical coloring effects such as diffraction, interference and scattering even in a wavelength region where the plastic material exhibits transparency.
• PET polyethylene terephthalate
• PET shows transparency for wavelengths from 0.38 m to 1.0 m, including the visible light range (0.4 m to 0.7 m), and near-ultraviolet light ( It shows translucency in the range of 0.3 m to 0.38 ⁇ m) and opacity in the deep ultraviolet region (0.3 m or less).
• a plastic wrapper made of PET material having such wavelength characteristics of light transmittance has a third harmonic of a YAG laser with a wavelength of 0.355 m, which is included in a translucent wavelength region.
• a periodic structure that develops physical coloring in the visible light region (0.4; wm to 0.7 um) is formed. Can be.
• a plastic package made of PET material having such a wavelength characteristic of light transmittance contains a fourth harmonic of a YAG laser with a wavelength of 0.266 m, which is included in the opaque wavelength region.
• a periodic structure that produces physical coloring can be formed.
• any method such as the first to third embodiments and a method utilizing the self-forming effect of the fine periodic structure can be used.
• the above method of forming a periodic structure is applied to a single-layer plastic package. It may be applied to a multilayer plastic package.
• Light of the above-mentioned specific wavelength is applied to a multilayer plastic package having a layer configuration in which a layer made of a plastic material transparent to a specific wavelength and a layer made of an opaque or translucent plastic material are adjacent to each other. Irradiation from the transparent material layer side is allowed to pass through the transparent material layer to form a periodic structure at the interface between the opaque material layer and the transparent material layer or inside the translucent material layer.
• optical characteristics of the plastic material arbitrary optical characteristics can be imparted by blending an absorbing material or the like for a specific wavelength, in addition to using characteristics unique to the plastic material.
• the plastic package of the present invention does not use a coloring agent such as a pigment or a dye due to chemical coloring, the amount of chemical substances used can be reduced.
• the plastic bottle container formed in advance is decorated. However, after the decoration is performed on the preform by the above-described method, the preform is formed into the bottle container as the final product. May be.
• the present invention can be applied to packages such as cups, admirs, trays and tube containers.
• the reclaiming method of the present invention is a reclaiming method in which a plastic package is collected and melted to perform a reclaiming process, and the melting for reclaiming is performed at a temperature higher than a temperature at which the color of the plastic package disappears. It is characterized by:
• the melting can be performed using, for example, a melt extruder or the like.
• Melting for regeneration is performed at a temperature above which the regular structure (thin film laminated structure, crystal structure, cavities, etc.) of the plastic package is destroyed, that is, the temperature at which the color of the package disappears.
• the melting temperature is 220 ° C or higher (for example, 250 ° C).
• the set temperature of the flow path through which the resin is transferred while being melted is set to 250 ° C. or the like.
• the plastic package By melting at such a temperature, the plastic package loses its color because its regular structure, which is the principle of coloring, is destroyed. As a result, even if the collected plastic package is colored, the color can be erased when the plastic package is melted.
• the plastic package 1 is manufactured so that the coloring structure of the thin film laminated structure 2 (or a combination of the thin film laminated structure 2 and another resin layer 3) is not destroyed. .
• the plastic package of the present invention can have a function of a visible light barrier and decoration by coloring in the manufacturing process, while it is decolorized in the process of recovery and re-production.
• the evaluation criteria for reusability suitability can be satisfied and recycling is possible. Therefore, the reuse rate of the once-distributed packaging structure can be increased, thereby promoting recycling.
• the colored bottle is pulverized by a crusher (Horai Co., Ltd. model VC3-360) into flakes, supplied to the injection molding machine, and subjected to a plasticization temperature of 280 ° C.
• a crusher Horai Co., Ltd. model VC3-360
• Polypropylene (FH1016) [Sumitomo Mitsui Polyolefin] was supplied to an extruder hopper to form a single-layer direct blow bottle (21 g). Next, a thin film having a thickness of 300 nm was formed on the bottle wall surface by dip coating in the same manner as in Example 1, and was colored.
• the prepared colored bottle was pulverized and injection-molded in the same manner as in Example 1, and the obtained injection sheet was decolorized.
• a thin-film laminated bottle was molded in the same manner as in Example 1 except that the thickness of the polymethylmethacrylate on the outer surface of the preform was set to 20 ⁇ m, but no color development was observed.
• Example 1 a laminated film having an adhesive layer was attached by thermocompression bonding to the surface of the body of the bottle container that had been biaxially stretched and blown to obtain a colored pottle.
• the prepared colored bottle was pulverized and injection-molded in the same manner as in Example 1, and the obtained injection sheet was decolorized.
• the laminated film used is an alternating multi-layer thin film of polyethylene terephthalate and nylon 6, and the color changes depending on the viewing angle due to thin film interference.
• the color erasing temperature of this film was 220 ° C.
• Polypropylene (FH1016) [Sumitomo Mitsui Polyolefin] was supplied to an extruder hopper to form a single-layer direct blow bottle (25 g). Next, the laminated film having the adhesive layer used in Example 1 was adhered to the body surface of the bottle container by thermocompression to obtain a colored pottle.
• the colored bottle was pulverized in the same manner as in Example 1, and a sheet having a thickness of 1.5 mm was formed at a plasticization temperature of 200 ° C. Was left inside.

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• 2004
  • 2004-05-14 WO PCT/JP2004/006882 patent/WO2004101270A1/ja active Application Filing
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